![]() Brunhoferova, Hana ![]() ![]() ![]() in Journal of Environmental Management (2022) The focus of this study is the characterization of unconventional sand-based substrates used in our previous project EmiSûre, (Interreg Greater Region (German federal states Rhineland-Palatinate and ... [more ▼] The focus of this study is the characterization of unconventional sand-based substrates used in our previous project EmiSûre, (Interreg Greater Region (German federal states Rhineland-Palatinate and Saarland, the Grand Duchy of Luxembourg, regions Wallonia and Lorraine from Belgium and France, respectively), 2017–2021). The project aimed to develop and test alternative, nature-based technologies for the elimination of micropollutants (MPs) from municipal wastewater. For the characterization, two approaches were chosen. In the first approach, adsorption kinetics with a single compound allowed a perception of the adsorption capacity of the studied substrates compared to conventional substrates (granular activated carbons). This knowledge was completed by the second approach: an implementation of the studied substrates in packed-bed columns, which treated a mixture of 27 MPs in tap water for 10 months. Additionally, all three substrates (bentonite sand, sand with 15% activated biochar and sand with 15% zeolite) were characterized for physical and chemical properties, and the microbial potential of the activated and non-activated biochar was examined. From the studies, it is clear that the sand with an admixture of activated biochar is the most efficient sorbent in terms of single compound adsorption in batch (dye) and adsorption of 27 MPs on packed-bed columns. In contrast to the two other substrates, it shows long-term stable removal efficiencies. In the packed-bed columns, 18 out of 27 compounds were removed on average with high efficiency (80–99%), which is impressive, if we consider the variety of the compounds examined (pharmaceuticals, herbicides, pesticides, etc.) and their removal in conventional treatments. Addi- tionally, adsorption models were created for the experimental data of all compounds adsorbed on the substrate with an admixture of activated biochar resulting in the best fit with the combined Langmuir-Freundlich model. These satisfying results suggest the application of the sand-based substrate with an admixture of activated biochar for further research and possibly upscale installations with the aim to offer and prove a reasonable and efficient alternative for MPs elimination from municipal wastewater. [less ▲] Detailed reference viewed: 45 (2 UL)![]() Salmeron Garcia, Irene ![]() ![]() ![]() in Proceedings of the 39th IAHR World Congress (Granada, 2022) (2022, June) Detailed reference viewed: 66 (12 UL)![]() Venditti, Silvia ![]() ![]() in Water Science and Technology (2022) The present research aims at giving an approach to the issue of surface water contamination due to micropollutants in rural areas. The catchment of the Sûre river was selected as a reference case for the ... [more ▼] The present research aims at giving an approach to the issue of surface water contamination due to micropollutants in rural areas. The catchment of the Sûre river was selected as a reference case for the Greater Region, characterized mainly by settlements with low population density, small water bodies and small- to medium-sized wastewater treatment plants (WWTPs). For these WWTPs, conventional technical solutions for micropollutants elimination are not suitable; therefore, an adapted mitigation strategy is needed to prevent the impact of micropollutants, especially during the dry season. As a suitable alternative to more intensive technologies, Constructed Wetlands (CW) in Vertical Flow (VF) configuration have been successfully tested over one-year period and the elimination rate of 27 micropollutants was quantified. Emission reduction by VF was then considered in a static mass balance model that calculates the longitudinal concentrations profile for the entire river catchment. The EmiSûre approach which focuses on river quality (concentrations of pollutants) instead of emitted loads, effectively allowed to simulate adopted measures a priori and resulted efficient to support decision-makers with WWTPs upgrade scenarios. [less ▲] Detailed reference viewed: 69 (2 UL)![]() ![]() Salmeron Garcia, Irene ![]() ![]() ![]() Scientific Conference (2022, June) Benzotriazole, carbamazepine, clarithromycin and diclofenac have been identified as microcontaminants of concern in Luxembourgish wastewaters, thus the implementation of photo-Fenton processes at natural ... [more ▼] Benzotriazole, carbamazepine, clarithromycin and diclofenac have been identified as microcontaminants of concern in Luxembourgish wastewaters, thus the implementation of photo-Fenton processes at natural pH has been proposed for their removal. In the present work, the effectiveness of a pilot scale photo-Fenton system (500W Medium Pressure) has been evaluated according to the reagent dosage and toxicity of the treated effluent. With this treatment, 80% degradation is achieved in 15 minutes even with 5 and 3 mg/L of iron (40 mg/L H2O2), but 5 mg/L can have a negative effect on the growth of Sorghum saccharatum in Phytotoxicity tests. In comparison UV-C/H2O2 (40W Low Pressure; 40 mg/L H2O2) process needs longer treatment time and generates degradation by-products causing a growth inhibition of Sorghum saccharatum. The combination of both lamps can lead to a better performance of the reagents allowing to reach the 80% target in less time and to reduce the dosage. [less ▲] Detailed reference viewed: 90 (10 UL)![]() Brunhoferova, Hana ![]() ![]() ![]() in Sustainability (2022), 14(7), 3944 Background: Micropollutants in bodies of water represent many challenges. We addressedthese challenges by the application of constructed wetlands, which represent advanced treatmenttechnology for the ... [more ▼] Background: Micropollutants in bodies of water represent many challenges. We addressedthese challenges by the application of constructed wetlands, which represent advanced treatmenttechnology for the removal of micropollutants from water. However, which mechanisms specificallycontribute to the removal efficiency often remains unclear. Methods: Here, we focus on the removalof 27 micropollutants by bioremediation. For this, macrophytesPhragmites australis,Iris pseudacorusandLythrum salicariawere taken from established wetlands, and a special experimental set-up wasdesigned. In order to better understand the impact of the rhizosphere microbiome, we determinedthe microbial composition using 16S rRNA gene sequencing and investigated the role of identifiedgenera in the micropollutant removal of micropollutants. Moreover, we studied the colonizationof macrophyte roots by arbuscular mycorrhizal fungi, which are known for their symbiotic rela-tionship with plants. This symbiosis could result in increased removal of present micropollutants.Results: We foundIris pseudacorusto be the most successful bioremediative system, as it removed22 compounds, including persistent ones, with more than 80% efficiency. The most abundant generathat contributed to the removal of micropollutants werePseudomonas, Flavobacterium, Variovorax,Methylotenera, Reyranella, AmaricoccusandHydrogenophaga.Iris pseudacorusexhibited the highest colo-nization rate (56%). Conclusions: Our experiments demonstrate the positive impact of rhizospheremicroorganisms on the removal of micropollutants. [less ▲] Detailed reference viewed: 66 (5 UL)![]() Venditti, Silvia ![]() ![]() ![]() in Science of the Total Environment (2022) Detailed reference viewed: 64 (3 UL)![]() Nunez Tafalla, Paula ![]() ![]() ![]() in Proceedings of the 39th IAHR World Congress (Granada, 2022) (2022) Detailed reference viewed: 32 (1 UL)![]() Brunhoferova, Hana ![]() ![]() ![]() in Book of Abstracts - "9th International Symposium on Wetland Pollutant Dynamics and Control - WETPOL 2021" (2021, September 15) Detailed reference viewed: 38 (1 UL)![]() Brunhoferova, Hana ![]() ![]() ![]() in Chemosphere (2021) Detailed reference viewed: 61 (4 UL)![]() Brunhoferova, Hana ![]() ![]() ![]() Poster (2021, March 18) Detailed reference viewed: 37 (1 UL)![]() Brunhoferova, Hana ![]() ![]() ![]() in „Mladá voda břehy mele 2020“ Sborník konference (2020, September 09) Detailed reference viewed: 56 (5 UL)![]() Frkova, Zuzana ![]() ![]() in Resources, Conservation and Recycling (2020), 162 Production of biodiesel is one of the most important European targets within renewables for the future. To consider biodiesel a feasible alternative to fossil fuel, unconventional resources need to be ... [more ▼] Production of biodiesel is one of the most important European targets within renewables for the future. To consider biodiesel a feasible alternative to fossil fuel, unconventional resources need to be exploited. This review aims to provide up-to-date knowledge on the existing reuse of lipids from urban wastewater to produce biodiesel. Lipids are readily removed by mixed microbial populations during wastewater treatments in sewage plants. Assessment results on potential annual European market supply indicate 3 – 414 104 tons (min for activated and max for grease trap sludge) of potentially extractable biodiesel from wastewater and an expected biodiesel demand of 14.8 106 tons. Considering the prospect of transforming sewage plants into biorefineries, we may cover on average 1.5, 6.2, 6.7 and 24.4% of activated, primary, scum and grease trap sludge respectively, of the European biodiesel market from wastewater-derived lipids. In addition, by implementing an optimized biotechnology selector, the overall biodiesel yield could be higher due to increased lipid incorporation into microbial biomass. This is not an insignificant amount and, if efficiently implemented, could represent an exploitable resource for biofuel production, an important and desired step towards a circular economy. The technology readiness level is still very low. There are several challenges and possible drawbacks, e.g., biogas yield loss, substrate depletion, or formation of floating sludge. Finally, no definitive legislative barriers towards wastewater-derived lipids have been identified; however, quality criteria as well as waste status have to be defined. [less ▲] Detailed reference viewed: 122 (8 UL)![]() Brunhoferova, Hana ![]() ![]() ![]() in Removal of micropollutants in medium-sized WWTP by vertical flow constructed wetlands (VFCWs): performance under laboratory and real conditions (2020, February 14) Micropollutants generated in urban agglomerates are commonly found in aquatic environments where they may present a potential danger. Constructed wetlands (CWs) are an attractive alternative for the ... [more ▼] Micropollutants generated in urban agglomerates are commonly found in aquatic environments where they may present a potential danger. Constructed wetlands (CWs) are an attractive alternative for the removal of those compounds from the effluent of medium-sized wastewater treatment plants (WWTPs). To this end, the INTERREG Greater Region-funded project EmiSûre aims to find solutions to mitigate the emission of micropollutants from wastewater facilities. As a part of the project, this study starts with the trial of vertical flow (VF) CWs under lab-scale conditions aiming to select the best substrate. Following steps are designed to optimize the performance of VFCWs in terms of removal of micropollutans under real conditions (i.e. matrix, seasonal changes, temperature) and to derive first approaches for dimensioning. From all the examined substrates, activated biocoal showed the best results in removing macro- and micropollutants and is expected to be the most suitable substrate in long term perspectives. [less ▲] Detailed reference viewed: 47 (2 UL)![]() Frkova, Zuzana ![]() ![]() Scientific Conference (2020, February) There are market opportunities for raw materials from sewage, but for this the sewage treatment plants and the industry need alignment. This calls for a transition: sewage treatment plants need to switch ... [more ▼] There are market opportunities for raw materials from sewage, but for this the sewage treatment plants and the industry need alignment. This calls for a transition: sewage treatment plants need to switch from treating sewage to producing valuable materials. On the other hand, market parties need to regard sewage as a valuable source instead of ‘dirty unsafe water’. Last but not least, the policies should better fit this new circular practice. To realize these opportunities WOW! aims to develop value chains for three different raw materials from sewage: cellulose, PHA bioplastics and lipids. [less ▲] Detailed reference viewed: 111 (10 UL)![]() Brunhoferova, Hana ![]() ![]() ![]() in Book of abstracts Micropol 2019 (2019, August 21) Detailed reference viewed: 105 (21 UL)![]() Brunhoferova, Hana ![]() ![]() ![]() in Book of Abstracts 8th International Symposium On Wetland Pollutant Dynamics and Control (2019, January 30) Detailed reference viewed: 68 (9 UL)![]() Frkova, Zuzana ![]() ![]() Scientific Conference (2019) By adopting a Circular Economy Package in 2015, European Commission aimed at stimulating transition towards a stronger and more circular economy where waste (including sewage) is no longer recognized as ... [more ▼] By adopting a Circular Economy Package in 2015, European Commission aimed at stimulating transition towards a stronger and more circular economy where waste (including sewage) is no longer recognized as waste, but as a valuable resource of raw materials. This review study assesses the existing methodologies to produce biodiesel from wastewater-derived lipids. Depending on the stage of wastewater treatment where biodiesel would be extracted, it may cover up to 20% of the current European biodiesel demand. Further studies in regards to the biodiesel quality, legislative conditions and techno-economic assessment towards respective transition are needed. [less ▲] Detailed reference viewed: 270 (3 UL)![]() ![]() Brunhoferova, Hana ![]() ![]() ![]() Poster (2018, October 02) Detailed reference viewed: 41 (4 UL)![]() Brunhoferova, Hana ![]() ![]() ![]() Scientific Conference (2018, March 13) Detailed reference viewed: 45 (1 UL)![]() Venditti, Silvia ![]() ![]() in 16th IWA Wetland System for Water Pollution Control, ICWS2018 (2018) Detailed reference viewed: 70 (3 UL) |
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